7
Expressions
[expr]
7.5
Primary expressions
[expr.prim]
7.5.5
Names
[expr.prim.id]
7.5.5.4
Pack indexing expression
[expr.prim.pack.index]
pack-index-expression
:
id-expression
.
.
[
constant-expression
]
1
#
The
id-expression
P
in a
pack-index-expression
shall be an
identifier
that denotes a pack
.
2
#
The
constant-expression
shall be a converted constant expression (
[expr.
const]
) of type
std
::
size_
t
whose value
V
, termed the index, is such that
0
≤
V
<
sizeof
.
(
P
)
.
3
#
[
Note
1
:
A
pack-index-expression
denotes the
V
th
element of the pack
.
—
end note
]